Heat interchanger



wumtoz T. E. MURRAY 150mm M Aug, 4, 1925 HEAT INTERCHANGER Aug, 4, 1925.

T. E. MURRAY HEAT INTERCHANGER Filed June 13, 19.25 2 Sheets-Sheet 2 vwemto'z. THU/W55. Mu/an Y @13 'ed/S abme/1i *1 Patented Aug.A 4, '1925.

form of the invention;

UNITED y STATES THOMAS E. MURRAY, .OF BROOKLYN, NE'W YORK.

.ippmmnm ma :une 1s, 192s. semina. 645,018. f t

To all whom t may concern.' v y Be it known that I, THOMAS E. MURRAY, a citizen of the United States, and resident of the city of Brooklyn, county of Kings, and State of New `lYorlnhave invented certain new and useful Improvements in I-Ieat Interchangers, of which the following 1s a specification.

This invention relates to'means whereby a heated fluid flowing through one conduit may give up its heat to a body of airror other fluid flowing through a juxtaposed conduit.

An embodiment of the invention is illustrated in the accompanying drawings in which Fig. 1 is a perspective view sho-wing an .air and a gas conduit illustrating one Fig. 2 is @transverse section on line 2 2 of F1g. 1; c

Fig. 3 is a longitudinal section on line 3 3 of Fig. 1;

Fig. 4 is a detail perspective view showing a portion of the corrugated plates used to form alternate passages for gasy and air;

Fig. 5 is a perspective view illustratingv a modified form of the invention;

Fig. 6 and Fig. 7 are section views on the correspondingly numbered lines of Fig. 5.

Referring first to Figs. l'to 4, 10 represents the inlet port of .a gas conduit having.

side walls 12 and 14, and top and bottom walls 16 and 18. 2O represents the outlet port of the gas conduit having top and bottom walls 22 and 24 and side walls 26 and 28.

Located below the gas outlet port 20 of the gas conduit is an inlet port-30 of an air conduit, and above the inlet port 10 of the gas conduit is the outlet port of the air conduit. The air'conduit has top, bottom and side walls as shown similar to thevgas conduit, and the waste gas is passed from the lower inlet port 10 to the upper outlet port 20 in the direction of the arrows The air is passed in the opposite direction from the inlet port 30 toward the outlet port 40 as indicated by the arrows y in Figs. l and 3. In other words, the gas and air pass counter-current to each other. Located between the gas inlet and gas outlet ports and alsobetween the air inlet and air outlet ports, I mount a structure forming a multiplicity of alternate cells or chambers' for the. passage of the air and gas.

As shown in Figs. 1 and 4, this structure .v A A HEAT INTEBCHANGER.

' consists of a series of corru ated walls orA plates 41`joined at one endV y narrow end walls 42 and at the lopposite lend by walls 44. The walls 42 are cut away as at 46 leaving open 'end passages as indicated at 48 in'Figs. 1 and 4 for the passage of gas through the space between two opposed walls 41.

In a similarmanner, .the walls 44 are cut away to form passages 50 whereby the air from the port 30 can flow between the op-r posed walls 41.

Stated in another way, the central-portion of the heat interchanger is a cellular structure formed of a corrugated plate bent back andforth in a sinuous orzig-zag manner so as to form a multiplicity of spaced walls 41 connected at their ends by walls 42 and v44. The walls 42 are cut away as at 46 to permit theL-passage of gas from the port 10 through alternate chambers be. tween the walls 41, and theend walls 44 are cut away at 50 so as to-permit the passage of yair from port 30 to flow through the chambers adjacent'to the gas passages.

In the drawings the chambers through which the air passes are designated by a, and the passages through which the gas passes are designated by g. The passages a are open-ended opposite the outlet air port 40 and are closed by the walls 44 opposite the gas port 20. The portion of the wall 44 below the gas port 20, or inline with the air port 30, Ais cut away as at 50 to permit' the air to enter the passages a.. Similarly the end walls 42 are cut away as at 46 to permit the gas to enter the passages g opposite the inlet port 10 and to permit the gasto pass out the open spaces opposite the gas port 20.

As thus arranged it is appa-rent that the gas and air are split up into adjacent layers so that the hot gas passing through one of the narrow chambers between the walls41 heats up the wall and thereby transmits its heat to the 4air flowing through the adjacent passa e.

In igs. 5 to 7, I have shown a modified construction in which the gas conduit com prises an inlet port 50 and an outlet port 52. The air conduit comprises aninlet port 60 and an outlet port 61. The hot gas flowing from port 50 to port 52 flows through a plurality of passages 54, formed by a series of spaced corrugated plates 56.

The plates 56 are arranged in pairs .which are closed by end walls 58 and 60 so as to form independent passages 62 for the air to flow through. The passages 54 througih which the air iiofws are closed at the en s by walls 55 and 57 as shown in Fig. 7

As shown clearly in Figs. 6 and 7, the hot gas flows through the multiplicity 'of passa es 54 as indicated by the arrows and t e air flows at right angles thereto through the multiplicity of passages 62 as indicated by the arrows y.

From the foregoing it is apparent that i the invention provides means whereby va volume of hot gas, for example, the products of combustlon from a furnace or the like, can be passed through a multiplicity of passages, whileair, for example, to support combustion in a furnace, is passed throu h adjacent passages so as to be preheate by contact with the hot walls or plates defining the passages.

Though I have described with great particularty of detail the embodiments of the invention shown, it is not to be construed that I am limited thereto as changes in arrangement and substitution of equivalents ma be made by those skilled in the art wit out de arting from the invention as defined in t e appended claims.

What I claim 1s:

1. In a device of the class described, a pair of adjacent conduits and a multiplicity lof corrugated plates extending across the conduits and arranged to form a serias of alternate zig-zag passages' for the gas and air flowing in said conduits, whereby the gas iowing thrcu'gh` one conduit transmits its heat through said plates to the air flowing in the other conduit.

2. In a device 'of the class described, a continuous sheet b'ent to form plurality of plates shaped to present an extended. surface and arranged to form two independent sets of passages and means fon assing a fluid through each of said sets o passages e independently so that there is an interchange of heat between the fluids flowing in each of said sets of passages.

32A device of the class described comprisln a casing having conduits for the indepen ent passage of gas and air and a continuous sheet metal plate bent back and forth to form a multiplicity of cells, said conduits being dis osed one over the other and the size of said plate in one direction being equal to lhe combined height of both said conduits a d the bent end walls of plate having ports. so arran ed that the as and air are compelled to eave the ce s at a different elevation than that at which they enter.

In Witness whereof, I have hereunto signed my name.

' THOMAS E. MURRAY, 

